libavfilter/dnn: support multiple outputs for tensorflow model

some models such as ssd, yolo have more than one output.

the clean up code in this patch is a little complex, it is because
that set_input_output_tf could be called for many times together
with ff_dnn_execute_model_tf, we have to clean resources for the
case that the two interfaces are called interleaved.

Signed-off-by: Guo, Yejun <yejun.guo@intel.com>
Signed-off-by: Pedro Arthur <bygrandao@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/libavfilter/dnn_interface.h b/libavfilter/dnn_interface.h
index 822f6e5b68..73d226ec91 100644
--- a/libavfilter/dnn_interface.h
+++ b/libavfilter/dnn_interface.h
@@ -26,6 +26,8 @@
 #ifndef AVFILTER_DNN_INTERFACE_H
 #define AVFILTER_DNN_INTERFACE_H
 
+#include <stdint.h>
+
 typedef enum {DNN_SUCCESS, DNN_ERROR} DNNReturnType;
 
 typedef enum {DNN_NATIVE, DNN_TF} DNNBackendType;
@@ -40,7 +42,7 @@ typedef struct DNNModel{
     void *model;
     // Sets model input and output.
     // Should be called at least once before model execution.
-    DNNReturnType (*set_input_output)(void *model, DNNData *input, const char *input_name, const char *output_name);
+    DNNReturnType (*set_input_output)(void *model, DNNData *input, const char *input_name, const char **output_names, uint32_t nb_output);
 } DNNModel;
 
 // Stores pointers to functions for loading, executing, freeing DNN models for one of the backends.
@@ -48,7 +50,7 @@ typedef struct DNNModule{
     // Loads model and parameters from given file. Returns NULL if it is not possible.
     DNNModel *(*load_model)(const char *model_filename);
     // Executes model with specified input and output. Returns DNN_ERROR otherwise.
-    DNNReturnType (*execute_model)(const DNNModel *model, DNNData *output);
+    DNNReturnType (*execute_model)(const DNNModel *model, DNNData *outputs, uint32_t nb_output);
     // Frees memory allocated for model.
     void (*free_model)(DNNModel **model);
 } DNNModule;